Degradation method of polyamide polymer

The invention discloses a degradation method of a polyamide polymer, which comprises the following steps: mixing an organic acid serving as a solvent with a waste polyamide polymer to realize the depolymerization of the polymer; the waste polyamide polymer contains an amide repeating unit formed by lactam ring opening polymerization, the depolymerization product is acylamino alkanoic acid, or the waste polyamide polymer contains an amide repeating unit formed by carboxylic acid and amine copolymerization, and the depolymerization product is a derivative of dicarboxylic acid and diacylamino. The depolymerization method has the advantages of simple operation, high polyamide conversion rate, high product purity, simple product separation and wide application range, and can realize depolymerization of most of waste polyamides in the market. 本发明公开了一种聚酰胺类聚合物的降解方法，利用有机酸作为溶剂，将有机酸与废旧聚酰胺聚合物混合，即可实现聚合物的解聚；所述废旧聚酰胺聚合物包含内酰胺开环聚合形成的酰胺重复单元，解聚产物为酰基氨基烷酸，或者包含羧酸与胺共聚形成的酰胺重复单元，解聚产物为二元羧酸和二酰基胺基的衍生物。本发明解聚方法操作简单，聚酰胺转化率高，产物纯度高，且所得产物分离简单，